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Laser-weldable modified polypropylene material and preparation method thereof

A polypropylene material and laser welding technology, which is applied in the field of laser welding, can solve the problems of poor near-infrared light permeability and other problems, achieve the effect of breaking through performance bottlenecks, improving permeability, and broadening the application field

Inactive Publication Date: 2020-02-14
JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a laser-weldable modified polypropylene material and its preparation method, which overcomes the shortcomings of existing polypropylene modified plastics that have poor permeability to 900-1100nm near-infrared light

Method used

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  • Laser-weldable modified polypropylene material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The raw materials of this embodiment are: in parts by weight, 83.4 parts of copolymerized polypropylene, 15 parts of mica powder, 0.3 parts of nano silicon dioxide, 0.3 parts of hindered phenolic antioxidants, 0.3 parts of phosphite antioxidants, 0.3 parts of hindered amines 0.4 parts of light stabilizer, 0.3 parts of perylene-based black toner.

[0029] The above-mentioned raw materials were put into a high-speed mixer and mixed, the mixing speed was 600 rpm, and the mixing time was 2 minutes.

[0030] The above-mentioned mixed raw materials are fed into a twin-screw extruder, melt-blended, extruded and granulated at a temperature of 200° C. to finally obtain a product.

Embodiment 2

[0032] The raw materials of this embodiment are: in parts by weight, 77.8 parts of copolymerized polypropylene, 20 parts of mica powder, 0.5 parts of nano silicon dioxide, 0.4 parts of hindered phenolic antioxidants, 0.4 parts of phosphite antioxidants, 0.4 parts of hindered amines 0.5 part of light stabilizer, 0.4 part of perylene-based black toner.

[0033] The above-mentioned raw materials were put into a high-speed mixer and mixed, the mixing speed was 600 rpm, and the mixing time was 2 minutes.

[0034] The above-mentioned mixed raw materials are fed into a twin-screw extruder, melt-blended, extruded and granulated at a temperature of 200° C. to finally obtain a product.

Embodiment 3

[0036] The raw materials of this embodiment are: in parts by weight, 88.9 parts of polypropylene copolymer, 10 parts of glass fiber, 0.2 part of nano-calcium carbonate, 0.2 part of hindered phenolic antioxidant, 0.2 part of phosphite antioxidant, 0.2 part of hindered amine light 0.3 parts of stabilizer, 0.3 parts of perylene-based black toner.

[0037] The above-mentioned raw materials were put into a high-speed mixer and mixed, the mixing speed was 600 rpm, and the mixing time was 2 minutes.

[0038] The above-mentioned mixed raw materials are fed into a twin-screw extruder, melt-blended at a temperature of 220° C., extruded and granulated, and finally a product is obtained.

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Abstract

The invention relates to a laser-weldable modified polypropylene material and a preparation method thereof. The laser-weldable modified polypropylene material is composed of the following components in parts by weight: 50 to 90 parts of polypropylene, 0 to 20 parts of a toughening agent, 10 to 30 parts of a filling agent, 0.05 to 1.0 part of nano particles, 0.1 to 0.5 part of an antioxidant, 0.1 to 0.5 part of a light stabilizer and 0.05 to 1.0 part of light-transmitting black powder. Through the synergistic effect of the light-transmitting black powder and the nano particles, the permeabilityof the polypropylene material to 900-1100 nm near-infrared light is improved, the requirements for rapidness and low energy consumption of laser welding can be met, the performance bottleneck is broken through, and the application field of the laser welding technology to plastic parts on automobiles is greatly widened.

Description

technical field [0001] The invention belongs to the field of laser welding, in particular to a laser-weldable modified polypropylene material and a preparation method thereof. Background technique [0002] At present, friction vibration welding is a main method of bonding automobile assembly parts. However, with the demand for lightweight vehicles, low pollution and energy saving are the main development trends. In the actual production process, when friction vibration welding is used to bond parts, welding marks will appear on the front of the parts, which will affect the appearance. And laser welding can solve this problem very well. The principle is to use the heat generated by the laser beam to melt the surface layer of the plastic contact surface, so that the two parts are bonded together. [0003] Laser welding technology requires that the upper parts of the two weldments have a certain degree of light transmission, while the lower parts have the effect of absorbing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08C08K13/06C08K9/06C08K3/34C08K7/14C08K3/36C08K3/26C08K3/22C08K5/00
CPCC08K13/06C08K9/06C08K3/34C08K3/36C08K5/0041C08K7/14C08K3/26C08L23/14C08K2201/011C08K2003/2227C08K2003/265
Inventor 谢正瑞陈桂吉陈延安孙刚
Owner JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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